Question

When hydrogen is passed over copper oxide, copper and steam are formed. Write a balanced equation for this reaction and state which of the chemicals are:
(i) elements
(ii) compounds
(iii) reactants
(iv) products
(v) metals
(vi) non-metals

Answer 1

The balanced equation for the reaction of hydrogen gas and copper oxide is written as follows:
H₂ (g) + CuO (s) $\to$ Cu (s) + H₂O (g)

(i) Elements: Hydrogen (H₂) in reactants' side and copper (Cu) in products' side are elements.
(ii) Compounds: Copper oxide (CuO) in reactants' side and water (H₂O) in products' side are the compounds.
(iii) Reactants: H₂ and CuO are the reactants.
(iv) Products: Cu and H₂O are the products.
(v) Metals: Cu is a metal.
(vi) Non-metals: H₂ is a the non-metal.